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From: Ronald G Minnich <rminnich@lanl.gov>
To: 9fans@cse.psu.edu
Subject: Re: [9fans] Private Namespaces for Linux
References: <Pine.GSO.4.21.0111201553030.23604-100000@weyl.math.psu.edu> <0111201448570B.13061@snaresland>
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Date: Tue, 20 Nov 2001 15:28:19 -0700
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On Tuesday 20 November 2001 14:48, Ronald G Minnich wrote:
>
> > To start with, namespaces had been available on 2.4 since at least
> > March.  See patches on ftp.math.psu.edu/pub/viro/ - namespaces-* is that
> > + related VFS cleanups.  Currently most of that is merged into the main
> > tree. Remaining stuff will go in when I'll somewhat clean the backlog on
> > other things.  And it's a real thing - it isn't limited to #M
> > combinations, any fs can be used.

So for those of you, like me, who try to follow this up:

The patches:
cftp /pub/viro > ls *name*
U4-rename-S5                           namespaces-a-S8-pre2
namespaces-S2.gz@                      namespaces-a-S8-pre3
namespaces-a-S10-pre2                  namespaces-a-S8-pre4
namespaces-a-S10-pre9                  namespaces-b-S3-pre8.gz
namespaces-a-S11-pre5.gz               namespaces-b-S4-pre6.gz
namespaces-a-S2.gz                     namespaces-c-S4-pre6.gz
namespaces-a-S4.gz                     namespaces-c-S5
namespaces-a-S6-pre2                   namespaces-c-S5-pre6.gz
namespaces-a-S6-pre5                   namespaces-d-S2.gz
namespaces-a-S7-pre3                   namespaces-d-S4-pre6.gz
ncftp /pub/viro >

Hmm, now what. Given the pace of change in 2.4 kernels, I can perhaps be
forgiven for wondering how solid all this will be.

Anyway, once it's really in I'll be happy to give it a shot. Although some
folks I know who are using it aren't quite sure it fits the description of
"private name spaces"

Also, Linux-specific only. My stuff does do the libc hack on several other
OSes, including freebsd.

Just FYI.

Oh, forgot to mention: the libc interface to my stuff also supports exporting
a name space and importing it into another process -- e.g. a child. You
really need that for fork(). But I think this will work in combination with
Erik Hendrik's bproc stuff, so you can get the equivalent of cpu on a
Scyld-based cluster. I have tested exporting name spaces to other processes
on other machines, and it works fine.

Oh, one other thing: Peter Braam and I did an alternate way of doing private
name spaces a few years ago on Linux, see the pnsdev at www.sourceforge.net.

Sorry to pollute this list with a non-plan-9 discussion, however, so I won't
respond to further flames unless they're private. Some messages are not worth
responding to in public.

ron